Cancer is caused by out of control

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

What characteristic make legumes a good food source for food insecure populations

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of